Abstract

Thermogravimetry coupled with Fourier transform infrared spectroscopy (TG-FTIR) is a useful technique for the thermal and structural characterization of materials at academic and research levels. This paper describes an experiment for chemistry students to understand the use of TG-FTIR for advanced qualitative and quantitative thermal analysis using a natural compound as a sample. In the classroom, students learned about the fundamental principle of thermal analysis, TG-FTIR instrumentation, and different applications of this coupled technique for materials characterization. In the laboratory, students received a description of each part of the TG-FTIR system, as well as how to tune the system and to develop a method. The primary objective of the experiment was to guide them in the interpretation of results including thermograms, infrared spectra, DSC, and Gram Schmidt (GS) curves. For this, students prepared and analyzed cellulose fibers extracted from pineapple leaves and a mixture of them with sodium h...

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